29383382 | Materials
25438606 | Doors, windows

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Product description

PENOSIL Premium Expanding Tape 300 is a pre-compressed, self-expanding, elastic joint seal created to protect external facade joints and window frame joints against wind, rain and dust. After installation, the material expands to fill the gap and create a permanently elastic and weathertight seal.


  • Self-expanding, fills uneven surfaces.
  • UV-resistant, seals against wind, dust, rain.
  • Provides thermal and sound insulation.
  • Helps minimize the risk of mould and abscesses in building structures.
  • Open cell structure allows joints to breath and moisture to escape.
  • Permanently elastic.
  • Safe for the environment and user.
  • Resists extreme temperatures.

Technical data

  • Sizes
    • 70 mm x 15 mm x 10 meters - Width 70 mm, expansion up to 15 mm, recommended for 3 - 4 mm gaps
    • 30 mm x 60 mm x 2.6 meters - Width 30 mm, expansion up to 60 mm, recommended for 12 - 20 mm spacing
    • 80 mm x 60 mm x 2.6 meters - Width 80 mm, expansion up to 60 mm, recommended for 12 - 20 mm spacing
  • Density at 23C - 80 kg / m3
  • Tensile strength - 155 kPa
  • Extensions - 170%
  • Pressure resistance - 4-5 kPa
  • Fire safety class (according to DIN 4102) - B2
  • Water absorption resistance (DIN EN 86) - 300 Pa
  • Long-term temperature resistance from -40 to + 80C
  • Long-term temperature resistance from -40 to + 100C

Application areas

  • Insulation of window and door frames and supporting structures.
  • Sealing concrete and masonry facade expansion joints.
  • Sealing of ceiling lights.
  • Sealing between roof elements.
  • Sealing of timber and log houses.
  • Noise and vibration insulation around ventilation and air exchange devices.
  • Noise and vibration insulation in car industry.

Adheres to

  • Wood
  • Concrete
  • Bricks
  • Plaster
  • Roof tiles
  • Natural stone
  • Ceramics
  • Most metals
  • Painted and varnished surfaces


  • After opening, the sealant expands slowly. Expansion speed depends on temperature and is faster in warm temperatures.
  • Ideal application temperature between +5 °C and +30 °C.
  • Contact surfaces should be clean, dry, free of dirt, dust and oil, parallel and right-angled.
  • To avoid under-compressed applications, use the dimension chart.


  • In external conditions must be covered.
  • Do not install the tape in edges; instead cut the tape and press the ends together under right angle. Press the excess part tightly in the edge.
  • When splicing the tape, press the ends tightly together, avoid overlapping.
  • Do not clean with pressurized water jet or with strong acid solvents.
  • Do not paint.
  • In high, humid and windy conditions, e.g. at the coast and on hills, please use Expanding Tape 600.

The color tones on the screen are reproduced electronically. They may differ from the actual color tone because our color perception is affected by the surface of the material, glare, lighting, and other factors. To accurately determine a color shade, we recommend that you use real color shade catalogs, always be confident in your choice, and use the color shade catalogs in an environment or conditions similar to those for which you choose a color.

The image of the product is informative. Specifications may vary depending on configuration and size. Fittings and their location may vary.

Contact our customer service for further information  www.ventum.lv 
Email: e-shop@ventum.lv, contact number: +371 25438606 (doors and furniture), +371 29 383 382 (building supplies)
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